Device for coupling a telegraph transmitter and sending-key.



C. M. HOLMES.

DEVICE FOR COUPLING A TELEGRAPH TRANSMITTER AND SENDING KEY.

APPLICATION FlLED MAR. 31. I916.

luff)". m l

Patented Jul 10, 1917.

the. key, and a split CHARLES MORRIS HOLMES, 0F JACKS ONVILLE, FLORIDA.

DEVICE FOR Specification of'letterl Patent.

COUPLING A TELEGRAPH 'IItANSMITTEIL AND SENDING-KEY.

Patented Jui 10, 1917.

Application flied March 31, 1816. Serial No. 87,966.

To albwhom it may concern:

-. Be it known that I, CHARLES M. Homms, a citizen of the United States, and a 'resi; dent of Jacksonville, and State of Florida, and Improved Device'for Con ling a Teleraph 'lransmit ter and Sen lag-Key, of which the following is a full, clear, and'exact description.

This invention relates to telegraph-apparatus and has to deal moreparticularly with a device for coupling a transmitter with a standard telegraph key.

The invention has for its general objects to provide a device of the character referred to which is reliable and ef'ficient in use, comparatively simple and inexpcusive to manufacture, and so design-led as to facilitate the have invented a new -connecting of thetransmitter with the sending key.

A more specific object-of the inventionis to improve a telegraph key for permitting a transmitter to he. ct'mnectcd by a cor'rl'with the key, the. coupling memo; inelu'dinga split mctal socket on the key with its parts respectively connected with the terminals of pin inscrtih'le .in the socket and connected with the. conductors of the cord wlnzrchy the. terminals of the transmitter can be ulm'tric'ally connected in a, reliable and positive manner with the sending key. 3

\Vith such, objects in view, and others which will appear as the descriptionprocoeds, the invention comprisesvarious novel features of" construction and arrangement of parts which will be set forthwith particularity in the followingdescription and claims a'muaulml hereto. i;

in tho aecm'npanyinp; drawing, which illustrates one embodiment of the'mvcntirm and \vhtwoin similar cha-ractci's oi reference indicate. corresponding parts in" all the views, 1 i

lti'gurc l a plan view of a key, shoi ing the. con ding device in section on the line l"-- l'. Fig.2; 1 i Fin. 2 is a .si;(lc. icw oi the keyand coupling de ice. one of the pivot hearings of the. hay being Fig. l

l'fin'. Fig. a Fin. '1 is a' ])i.|'H[")('(.l view of the socket removed;

in the county of Duvnl in section on the line"2-2,

l is :iw-ertical section on the. line. 3H3,

- i i toning: a.wire-20-.with

Fig. 5 is a detail sectional viewon'the lme 5-5, Fig. 3.

Iiig. 6 is a sectional view of the split plug; am

Fig. 7- is a sectional view on the line 77, Fig. 6.

Referring to the drawing, A designates an ordinary sending key to which'is applied the coupling device B, which latter may be in the. form of an attachment, as shown,- 'or it may he-a permanent part of the framework of the. key. The key comprises the usual parts consisting of the frame or base 1; posts 2 that support the pivot screws 3, and jam nut 4-: the key lever 5 fulerumed on the pivot s .-rc-.;-.: and having; a contact 6 adapted to engage the contact 7 carried by but insulated from the. frame 1; binding posts or terminals 5 and 9, the first of which is insulated from the frame. 1 and electrically connected with the plate 1 I which is electrically connect-ed with the contact 7 and has a spring switch member ll with which 'engagcsthe. cut-out lever 12 fulcrumed at 13 on the frame 1, and on the main-lever 5 IS the. usual stop set screw 14.

The. coupling device in the present instance is shown as 'an attachmentand is adapted to be titted. to the. pivot s'iipportin posts 9. of the. key. Itcomprises a meta l socket 15 split axially into two parts ll) and 17 which are, mounted on a block of insulation l8 and therehyinsulated from each other. The. socket parts are fastened to a bridge-piece 19 which bears on top of the posts 2, and fastened thereto by any suitable manner, as for instance, angle clips 20 which are secured toth'e endsofthe bridge iiaco by screws 21 and which have slots 22, arms which straddle them their dcpcndin pivot screw 3, am the jam nuts lmlampthe clipef against the outer faces of the 'pivot posts 2. By this manner a good electrical connection is obtained between the half 16- of the. socket and the frame of the key. The 1nd t l (i. of the socket is fastened to the bridge by .icrews parts. The. half 17 is connected othe bridge by screws 24- which are separa ed by insuliition 25 from the bridge piede asclearly shown in Fig. 5.- One of those s't'a'ews. 24. serves as a p the insnlated binding post 8 ofthe key. It will thus 'he'seen that the section 16 of ihefsocket 15 is grounded 23 which clcctrimilly connect these binding; post for fllS-- on the frame of the key, and hence is connccted with the circuit wire 27, and the section '17 of the socket is connected with the other circuit wire 28 through the conductor 26 and -binding post 8. The plug 29, which is ins'ertihlc in the socket 15, 15 made in two parts 30 and 31 separated by a strip 32 of insulation which projects beyond opposite edges of the parts 30 and 31, as shown in Fig. 7, so as to engage between the sections 16 and 17, thus preventing the insertion of the plug, except in proper position. The parts 30 and 31 are fastened in a sleeve or carrier 33 and they are connected respectively with the wires tl-l and of the cord 36, which leads to the transmitter.

From the foregoing description taken in connection with the :u-cr'ui'ipanying drawing, the. ad vantages of the construction and method of operation will he readily understood by those skilled in the art to which the invention apperl'ains, and while I have descrihed the principle ol operatiou, togcthcr with the device. which l now considerto be the best embodiment thereof, I desire to have it understood that the device shown is merely illustrativeand that such. changes may be made when desired as fall within the scope of the appended claims.

Having thus described my inventi n, I claim as new and desire to se ure by licllcrs Iutcnt 1. The combination of a (ch-graph kcy having the usual insulated and nninsulatcd terminals, with a dcricv for coupling a transmitter with the kc v. said device comprising a two-pnrt socket, the parts of which are insulated from each other and normally clentrically disconncctwl one part bcing connected with the uninsulated terminal of the key and the other part connected with the insulated terminal, a plug having two insulated arts insertible in the socket to respective y engage the parts thereof, a conductor cord having its wires connected respectively with the parts of the plug, and means for clampin the device to the frame of a ke 2. Tie combination ol a telegraph key having the usual insulated and uninsnlated terminals, with an attachment for coupling the key with a transmitter, said attachment comprising a support adapted to he clamped to the. frame of the key, a split socket having rigid parts insulated from cach other an normally electrically separated, one part being grounded on the su )port and thereby electrically connected wit: the uninsulatcd terminal, a conductor separate from the ke connecting the other )Illt of the socket wit the insulated terminal of the key, a'two art plug inscrtihle the socket. and con nctors connected. respectively with the parts of the plug and adapted to be connected with the transmitter.

3. The combination of a telegraph key including a framehaving key lever supporting posts and insulated and uninsulated terminals, with a device for coupling the key with a transmitter, said device comprising a hridgepiccc attached to and grounded on the posts, a split socket having its parts fastened to the bridge-piece and one being in snlatrd from the-other and from the-bridgepiece, a. conductor connecting th insulated part at the socket with the in.--;ulated terminal, andni two-part plug insertible in the socket and having means for preventing the plu from being inserted except in proper position. a

4. The combination of a telegraph key including a frame having insulated and uniusulaicd terminals, with a coupling attachmcnt [or connecting the key with a transmitter, said ultacluncnt forming a unitary device separable from the key and comprising a socket split longitudinally into two parts insulated from each other and one part being insulated from the frame, a conductor sepa rate from and connecting the insulated part of the socket with the insulated terminal, a plug split longitudinally into two )arts and harm" a ncec of insulation-be I n tween the parts, which insulation is adapted to engage into the split of the socket to limit the insertion of the plug in the proper man- Her, and conductors connected with the respect ive parts of the plug.

The combination of a telegraph, key including a frame having a lever provided with a contact, a contact with which the conlact on "the ler'er is adapted to engage, insulatcd and uninsulatcd binding posts on the frameand switch means for connecting the frame with the insnlatedcontact, with a device for coupling the key with a transmitter, said device comprising spaced socket members insulated from each other and one member being grounded on the frame and the other insulated therefrom, a conductor connecting the insulated binding post with the insulated socket member, a plug composed of insulated parts adapted to engage the respccti ve socket Inc-m nus. and conductors connected respectively with the parts of the plug. in name to this specification in the presence of two subscribing witnesses.

CHA RLES MORRIS HOLMES.

W itncsses:

J. A. lnnaars, Wu. ll. Mimi-z.

testimony whereof lv have signed my rec 

